1.
Roman numerals
–
The numeric system represented by Roman numerals originated in ancient Rome and remained the usual way of writing numbers throughout Europe well into the Late Middle Ages. Numbers in this system are represented by combinations of letters from the Latin alphabet, Roman numerals, as used today, are based on seven symbols, The use of Roman numerals continued long after the decline of the Roman Empire. The numbers 1 to 10 are usually expressed in Roman numerals as follows, I, II, III, IV, V, VI, VII, VIII, IX, Numbers are formed by combining symbols and adding the values, so II is two and XIII is thirteen. Symbols are placed left to right in order of value. Named after the year of its release,2014 as MMXIV, the year of the games of the XXII Olympic Winter Games The standard forms described above reflect typical modern usage rather than a universally accepted convention. Usage in ancient Rome varied greatly and remained inconsistent in medieval, Roman inscriptions, especially in official contexts, seem to show a preference for additive forms such as IIII and VIIII instead of subtractive forms such as IV and IX. Both methods appear in documents from the Roman era, even within the same document, double subtractives also occur, such as XIIX or even IIXX instead of XVIII. Sometimes V and L are not used, with such as IIIIII. Such variation and inconsistency continued through the period and into modern times. Clock faces that use Roman numerals normally show IIII for four o’clock but IX for nine o’clock, however, this is far from universal, for example, the clock on the Palace of Westminster in London uses IV. Similarly, at the beginning of the 20th century, different representations of 900 appeared in several inscribed dates. For instance,1910 is shown on Admiralty Arch, London, as MDCCCCX rather than MCMX, although Roman numerals came to be written with letters of the Roman alphabet, they were originally independent symbols. The Etruscans, for example, used

2.
Unmanned aerial vehicle
–
An unmanned aerial vehicle, commonly known as a drone, is an aircraft without a human pilot aboard. UAVs are a component of an unmanned aircraft system, which include a UAV, a controller. The flight of UAVs may operate with various degrees of autonomy, either under control by a human operator, or fully or intermittently autonomously. Compared to manned aircraft, UAVs are often preferred for missions too dull, civilian drones now vastly outnumber military drones, with estimates of over a million sold by 2015. Multiple terms are used for unmanned vehicles, which generally refer to the same concept. The term drone, more used by the public, was coined in reference to the resemblance of navigation. The term has encountered opposition from aviation professionals and government regulators. This term emphasizes the importance of other than the aircraft. It includes elements such as ground stations, data links. A similar term is a vehicle system remotely piloted aerial vehicle. Many similar terms are in use, therefore, missiles are not considered UAVs because the vehicle itself is a weapon that is not reused, though it is also unmanned and in some cases remotely guided. The relation of UAVs to remote controlled model aircraft is unclear, UAVs may or may not include model aircraft. Some jurisdictions base their definition on size or weight, however, a radio-controlled aircraft becomes a drone with the addition of an autopilot artificial intelligence, and ceases to be a drone when an AI is removed. In 1849 Austria sent unmanned, bomb-filled balloons to attack Venice, UAV innovations started in the early 1900s and originally focused on providing practice targets for training military personnel. UAV development continued during World War I, when the Dayton-Wright Airplane Company invented a pilotless aerial torpedo that would explode at a preset time, the earliest attempt at a powered UAV was A. M. Lows Aerial Target in 1916. Nikola Tesla described a fleet of unmanned aerial vehicles in 1915. Advances followed during and after World War I, including the Hewitt-Sperry Automatic Airplane, the first scaled remote piloted vehicle was developed by film star and model-airplane enthusiast Reginald Denny in 1935. More emerged during World War II – used both to train gunners and to fly attack missions

3.
United States Marine Corps
–
The U. S. Marine Corps is one of the four armed service branches in the U. S. Department of Defense and one of the seven uniformed services of the United States. The current Chairman of the Joint Chiefs of Staff, the military officer in the U. S. Armed Forces, is a Marine Corps general, the Marine Corps has been a component of the U. S. Department of the Navy since 30 June 1834, working closely with naval forces for training, transportation, and logistics. The USMC operates posts on land and aboard sea-going amphibious warfare ships around the world, two battalions of Continental Marines were formed on 10 November 1775 in Philadelphia as a service branch of infantry troops capable of fighting for independence both at sea and on shore. The role of the Corps has since grown and evolved, expanding to aerial warfare and earning popular titles such as, Americas third air force, and, second land army. By the mid-20th century, the U. S. Marine Corps had become a major theorist of and its ability to rapidly respond on short notice to expeditionary crises gives it a strong role in the implementation and execution of American foreign policy. As of 2016, the USMC has around 182,000 active duty members and it is the smallest of the U. S. The USMC serves as an expeditionary force-in-readiness and this last clause, while seemingly redundant given the Presidents position as Commander-in-chief, is a codification of the expeditionary responsibilities of the Marine Corps. It derives from similar language in the Congressional acts For the Better Organization of the Marine Corps of 1834, in 1951, the House of Representatives Armed Services Committee called the clause one of the most important statutory – and traditional – functions of the Marine Corps. In addition to its duties, the Marine Corps conducts Visit, Board, Search, and Seizure operations, as well as missions in direct support of the White House. The Marine Band, dubbed the Presidents Own by Thomas Jefferson, Marines from Ceremonial Companies A & B, quartered in Marine Barracks, Washington, D. C. The Executive Flight Detachment also provides transport to Cabinet members. The relationship between the Department of State and the U. S. Marine Corps is nearly as old as the corps itself, for over 200 years, Marines have served at the request of various Secretaries of State. After World War II, an alert, disciplined force was needed to protect American embassies, consulates, in 1947, a proposal was made that the Department of War furnish Marine Corps personnel for Foreign Service guard duty under the provisions of the Foreign Service Act of 1946. A formal Memorandum of Agreement was signed between the Department of State and the Secretary of the Navy on December 15,1948, during the first year of the MSG program,36 detachments were deployed worldwide. Continental Marines manned raiding parties, both at sea and ashore, the Advanced Base Doctrine of the early 20th century codified their combat duties ashore, outlining the use of Marines in the seizure of bases and other duties on land to support naval campaigns. Throughout the late 19th and 20th centuries, Marine detachments served aboard Navy cruisers, battleships, Marine detachments served in their traditional duties as a ships landing force, manning the ships weapons and providing shipboard security. Marines would develop tactics and techniques of amphibious assault on defended coastlines in time for use in World War II, during World War II, Marines continued to serve on capital ships

4.
Six-Day War
–
The Six-Day War, also known as the June War,1967 Arab–Israeli War, or Third Arab–Israeli War, was fought between June 5 and 10,1967 by Israel and the neighboring states of Egypt, Jordan, and Syria. Relations between Israel and its neighbours had never fully normalised following the 1948 Arab–Israeli War, in the period leading up to June 1967, tensions became dangerously heightened. In reaction to the mobilisation of Egyptian forces along the Israeli border in the Sinai Peninsula, the Egyptians were caught by surprise, and nearly the entire Egyptian air force was destroyed with few Israeli losses, giving the Israelis air superiority. Simultaneously, the Israelis launched an offensive into the Gaza Strip and the Sinai. After some initial resistance, Egyptian leader Gamal Abdel Nasser ordered the evacuation of the Sinai, Israeli forces rushed westward in pursuit of the Egyptians, inflicted heavy losses, and conquered the Sinai. Nasser induced Syria and Jordan to begin attacks on Israel by using the initially confused situation to claim that Egypt had defeated the Israeli air strike. Israeli counterattacks resulted in the seizure of East Jerusalem as well as the West Bank from the Jordanians, on June 11, a ceasefire was signed. Arab casualties were far heavier than those of Israel, fewer than a thousand Israelis had been killed compared to over 20,000 from the Arab forces. Israels military success was attributed to the element of surprise, an innovative and well-executed battle plan, Israel seized control of the Gaza Strip and the Sinai Peninsula from Egypt, the West Bank and East Jerusalem from Jordan, and the Golan Heights from Syria. Israeli morale and international prestige was greatly increased by the outcome of the war, across the Arab world, Jewish minority communities were expelled, with refugees going to Israel or Europe. After the 1956 Suez Crisis, Egypt agreed to the stationing of a United Nations Emergency Force in the Sinai to ensure all parties would comply with the 1949 Armistice Agreements, in the following years there were numerous minor border clashes between Israel and its Arab neighbors, particularly Syria. In early November 1966, Syria signed a defense agreement with Egypt. Jordanian units that engaged the Israelis were quickly beaten back, King Hussein of Jordan criticized Egyptian President Gamal Abdel Nasser for failing to come to Jordans aid, and hiding behind UNEF skirts. In May 1967, Nasser received false reports from the Soviet Union that Israel was massing on the Syrian border, the right of innocent, maritime passage must be preserved for all nations. On May 30, Jordan and Egypt signed a defense pact, the following day, at Jordans invitation, the Iraqi army began deploying troops and armoured units in Jordan. They were later reinforced by an Egyptian contingent, on June 1, Israel formed a National Unity Government by widening its cabinet, and on June 4 the decision was made to go to war. The next morning, Israel launched Operation Focus, a surprise air strike that was the opening of the Six-Day War. Before the war, Israeli pilots and ground crews had trained extensively in rapid refitting of aircraft returning from sorties and this has contributed to the Arab belief that the IAF was helped by foreign air forces

5.
United States Navy
–
The United States Navy is the naval warfare service branch of the United States Armed Forces and one of the seven uniformed services of the United States. The U. S. Navy is the largest, most capable navy in the world, the U. S. Navy has the worlds largest aircraft carrier fleet, with ten in service, two in the reserve fleet, and three new carriers under construction. The service has 323,792 personnel on duty and 108,515 in the Navy Reserve. It has 274 deployable combat vessels and more than 3,700 operational aircraft as of October 2016, the U. S. Navy traces its origins to the Continental Navy, which was established during the American Revolutionary War and was effectively disbanded as a separate entity shortly thereafter. It played a role in the American Civil War by blockading the Confederacy. It played the role in the World War II defeat of Imperial Japan. The 21st century U. S. Navy maintains a global presence, deploying in strength in such areas as the Western Pacific, the Mediterranean. The Navy is administratively managed by the Department of the Navy, the Department of the Navy is itself a division of the Department of Defense, which is headed by the Secretary of Defense. The Chief of Naval Operations is an admiral and the senior naval officer of the Department of the Navy. The CNO may not be the highest ranking officer in the armed forces if the Chairman or the Vice Chairman of the Joint Chiefs of Staff. The mission of the Navy is to maintain, train and equip combat-ready Naval forces capable of winning wars, deterring aggression, the United States Navy is a seaborne branch of the military of the United States. The Navys three primary areas of responsibility, The preparation of naval forces necessary for the prosecution of war. The development of aircraft, weapons, tactics, technique, organization, U. S. Navy training manuals state that the mission of the U. S. Armed Forces is to prepare and conduct prompt and sustained combat operations in support of the national interest, as part of that establishment, the U. S. Navys functions comprise sea control, power projection and nuclear deterrence, in addition to sealift duties. It follows then as certain as that night succeeds the day, that without a decisive naval force we can do nothing definitive, the Navy was rooted in the colonial seafaring tradition, which produced a large community of sailors, captains, and shipbuilders. In the early stages of the American Revolutionary War, Massachusetts had its own Massachusetts Naval Militia, the establishment of a national navy was an issue of debate among the members of the Second Continental Congress. Supporters argued that a navy would protect shipping, defend the coast, detractors countered that challenging the British Royal Navy, then the worlds preeminent naval power, was a foolish undertaking. Commander in Chief George Washington resolved the debate when he commissioned the ocean-going schooner USS Hannah to interdict British merchant ships, and reported the captures to the Congress

6.
World War II
–
World War II, also known as the Second World War, was a global war that lasted from 1939 to 1945, although related conflicts began earlier. It involved the vast majority of the worlds countries—including all of the great powers—eventually forming two opposing alliances, the Allies and the Axis. It was the most widespread war in history, and directly involved more than 100 million people from over 30 countries. Marked by mass deaths of civilians, including the Holocaust and the bombing of industrial and population centres. These made World War II the deadliest conflict in human history, from late 1939 to early 1941, in a series of campaigns and treaties, Germany conquered or controlled much of continental Europe, and formed the Axis alliance with Italy and Japan. Under the Molotov–Ribbentrop Pact of August 1939, Germany and the Soviet Union partitioned and annexed territories of their European neighbours, Poland, Finland, Romania and the Baltic states. In December 1941, Japan attacked the United States and European colonies in the Pacific Ocean, and quickly conquered much of the Western Pacific. The Axis advance halted in 1942 when Japan lost the critical Battle of Midway, near Hawaii, in 1944, the Western Allies invaded German-occupied France, while the Soviet Union regained all of its territorial losses and invaded Germany and its allies. During 1944 and 1945 the Japanese suffered major reverses in mainland Asia in South Central China and Burma, while the Allies crippled the Japanese Navy, thus ended the war in Asia, cementing the total victory of the Allies. World War II altered the political alignment and social structure of the world, the United Nations was established to foster international co-operation and prevent future conflicts. The victorious great powers—the United States, the Soviet Union, China, the United Kingdom, the Soviet Union and the United States emerged as rival superpowers, setting the stage for the Cold War, which lasted for the next 46 years. Meanwhile, the influence of European great powers waned, while the decolonisation of Asia, most countries whose industries had been damaged moved towards economic recovery. Political integration, especially in Europe, emerged as an effort to end pre-war enmities, the start of the war in Europe is generally held to be 1 September 1939, beginning with the German invasion of Poland, Britain and France declared war on Germany two days later. The dates for the beginning of war in the Pacific include the start of the Second Sino-Japanese War on 7 July 1937, or even the Japanese invasion of Manchuria on 19 September 1931. Others follow the British historian A. J. P. Taylor, who held that the Sino-Japanese War and war in Europe and its colonies occurred simultaneously and this article uses the conventional dating. Other starting dates sometimes used for World War II include the Italian invasion of Abyssinia on 3 October 1935. The British historian Antony Beevor views the beginning of World War II as the Battles of Khalkhin Gol fought between Japan and the forces of Mongolia and the Soviet Union from May to September 1939, the exact date of the wars end is also not universally agreed upon. It was generally accepted at the time that the war ended with the armistice of 14 August 1945, rather than the formal surrender of Japan

7.
Haskell-class attack transport
–
Haskell-class attack transports were amphibious assault ships of the United States Navy created in 1944. They were designed to transport 1,500 troops and their combat equipment, the Haskells were very active in the World War II Pacific Theater of Operations, landing Marines and Army troops and transporting casualties at Iwo Jima and Okinawa. Ships of the class were among the first Allied ships to enter Tokyo Bay at the end of World War II, after the end of World War II, most participated in Operation Magic Carpet, the massive sealift of US personnel back to the United States. A few of the Haskell class were reactivated for the Korean War, the Haskell class, Maritime Commission standard type VC2-S-AP5, is a sub‑type of the World War II Victory ship design. 117 were launched in 1944 and 1945, with 14 more being finished as another VC2 type or canceled, the VC2-S-AP5 design was intended for the transport and assault landing of over 1,500 troops and their heavy combat equipment. During Operation Magic Carpet, up to 1,900 personnel per ship were carried homeward, the Haskells carried 25 landing craft to deliver the troops and equipment right onto the beach. The 23 main boats were the 36 feet long, LCVP, the LCVP was designed to carry 36 equipped troops. The other 2 landing craft were the 50 foot long LCM, capable of carrying 60 troops or 30 tons of cargo, the Haskell-class ships were armed with one 5/38 caliber gun, twelve Bofors 40 mm guns, and ten Oerlikon 20 mm guns. See List of Haskell-class attack transports, Haskell-class attack transports included APA-117, USS Haskell, the lead ship, through APA-247, the never completed USS Mecklenburg. The hulls for APA-181 through APA-186 were repurposed to be hospital ships before they were named, ultimately those hospital ships were built on larger C4 plan and the six VC2 hulls were built in a merchant configuration. APA-240 through APA-247 were named, but cancelled in 1945 when the war ended, with the special exception of the USS Marvin H. McIntyre, the Haskell-class ships were all named after counties of the United States. Most of the Haskell-class ships were mothballed in 1946, with only a few remaining in service, many of the Haskell class were scrapped in 1973-75. A few were converted into Missile Range Instrumentation Ships, the USS Gage, the last remaining ship in the Haskell configuration, was scrapped in 2009 at ESCO Marine, in Brownsville, Tx. The USS Sherburne, which was converted and renamed USS Range Sentinel, lasted until she was scrapped in 2012

8.
USS Roper (DD-147)
–
USS Roper was a Wickes-class destroyer in the United States Navy, later converted to a high-speed transport and redesignated APD-20. She was named for Lieutenant Commander Jesse M. Roper, commanding officer of Petrel, as of 2016, no other ships in the United States Navy have borne this name. Ropers keel was laid down on 19 March 1918 by William Cramp & Sons and she was launched on 17 August 1918 sponsored by Mrs. Jesse M. Roper, widow of Lieutenant Commander Roper, and commissioned on 15 February 1919 with Commander Abram Claude in command. Roper was the first United States Navy warship to sink a German submarine during World War II. Following shakedown off the New England coast, Roper sailed east in mid-June 1919 and, after stops at Ponta Delgada, Gibraltar, and Malta, anchored in the Bosporus on 5 July. For the next month she supported Peace Commission and Relief Committee work in the Black Sea area, carrying mail and passengers to and from Constantinople, Novorossisk, Batum, Samsun, and Trebizond. On 20 August the destroyer returned to the United States, at New York City, at the end of the month she transited the Panama Canal and moved north to San Diego. Roper remained on the West Coast until July 1921, on 23 July, she departed San Francisco, for duty on the Asiatic Station. Arriving at Cavite, Philippine Islands, on 24 August, she remained in the Philippines into December and she then moved into Chinese waters and, into the summer, operated primarily from Hong Kong and Chefoo. On 25 August 1922, she headed back to California, routed via Nagasaki, Midway, and Pearl Harbor she arrived at San Francisco on 13 October. Two days later she shifted to San Pedro, California, thence proceeded to San Diego, recommissioned on 18 March 1930, Roper resumed operations in the Pacific. During 1933, Lieutenant, junior grade Robert A. Heinlein transferred aboard Roper, in 1934 he was promoted to Lieutenant, then invalided out, permanently disabled from tuberculosis. During January and February 1936, Roper moved north for operations in Alaskan waters, in February 1937, Roper departed California and, after transiting the Panama Canal, joined the Atlantic Fleet. For the remainder of the year, through 1938, and into 1939, she conducted exercises primarily off the mid-Atlantic seaboard and, during part of each year, in the Caribbean. In November 1939, after the outbreak of World War II in Europe, she shifted from Norfolk, Virginia, to Key West, Florida, whence she patrolled the Yucatan Channel, in December, she returned to Norfolk. In January 1940, she moved again, to Charleston, South Carolina. Through the prewar Neutrality Patrol period, Roper continued to range the waters off the East, off Cape Cod on 7 December 1941, she returned to Norfolk for an abbreviated availability at midmonth, and then steamed to NS Argentia, Newfoundland. In early February 1942, she completed an escort run to Londonderry Port, then, in March, returned to the Norfolk area for patrol

9.
Binary number
–
The base-2 system is a positional notation with a radix of 2. Because of its implementation in digital electronic circuitry using logic gates. Each digit is referred to as a bit, the modern binary number system was devised by Gottfried Leibniz in 1679 and appears in his article Explication de lArithmétique Binaire. Systems related to binary numbers have appeared earlier in multiple cultures including ancient Egypt, China, Leibniz was specifically inspired by the Chinese I Ching. The scribes of ancient Egypt used two different systems for their fractions, Egyptian fractions and Horus-Eye fractions, the method used for ancient Egyptian multiplication is also closely related to binary numbers. This method can be seen in use, for instance, in the Rhind Mathematical Papyrus, the I Ching dates from the 9th century BC in China. The binary notation in the I Ching is used to interpret its quaternary divination technique and it is based on taoistic duality of yin and yang. Eight trigrams and a set of 64 hexagrams, analogous to the three-bit and six-bit binary numerals, were in use at least as early as the Zhou Dynasty of ancient China. The Song Dynasty scholar Shao Yong rearranged the hexagrams in a format that resembles modern binary numbers, the Indian scholar Pingala developed a binary system for describing prosody. He used binary numbers in the form of short and long syllables, Pingalas Hindu classic titled Chandaḥśāstra describes the formation of a matrix in order to give a unique value to each meter. The binary representations in Pingalas system increases towards the right, the residents of the island of Mangareva in French Polynesia were using a hybrid binary-decimal system before 1450. Slit drums with binary tones are used to encode messages across Africa, sets of binary combinations similar to the I Ching have also been used in traditional African divination systems such as Ifá as well as in medieval Western geomancy. The base-2 system utilized in geomancy had long been applied in sub-Saharan Africa. Leibnizs system uses 0 and 1, like the modern binary numeral system, Leibniz was first introduced to the I Ching through his contact with the French Jesuit Joachim Bouvet, who visited China in 1685 as a missionary. Leibniz saw the I Ching hexagrams as an affirmation of the universality of his own beliefs as a Christian. Binary numerals were central to Leibnizs theology and he believed that binary numbers were symbolic of the Christian idea of creatio ex nihilo or creation out of nothing. Is not easy to impart to the pagans, is the ex nihilo through Gods almighty power. In 1854, British mathematician George Boole published a paper detailing an algebraic system of logic that would become known as Boolean algebra

10.
Wickes-class destroyer
–
The Wickes-class destroyers were a class of 111 destroyers built by the United States Navy in 1917–19. Along with the 6 preceding Caldwell-class and 156 subsequent Clemson-class destroyers, only a few were completed in time to serve in World War I, including USS Wickes, the lead ship of the class. While some were scrapped in the 1930s, the rest served through World War II, most of these were converted to other uses, nearly all in U. S. service had half their boilers and one or more stacks removed to increase fuel and range or accommodate troops. Others were transferred to the British Royal Navy and the Royal Canadian Navy, All were scrapped within a few years after World War II. The destroyer type was at time a relatively new class of fighting ship for the U. S. Navy. The type arose in response to torpedo boats that had been developing from 1865, a series of destroyers had been built over the preceding years, designed for high smooth water speed, with indifferent results, especially poor performance in heavy seas and poor fuel economy. The lesson of these destroyers was the appreciation of the need for true seakeeping and seagoing abilities. There were few cruisers in the Navy, which was a fleet of battleships and destroyers so destroyers performed scouting missions. A report of October 1915 by Captain W. S. Sims noted that the smaller destroyers used fuel far too quickly, and that war games showed the need for fast vessels with a larger radius of action. As a result, the size of U. S. destroyer classes increased steadily, starting at 450 tons and rising to over 1,000 tons between 1905 and 1916. The increase in size has never stopped, with some US Arleigh Burke-class destroyers now up to 10,800 tons full load. With World War I then in its year and tensions between the U. S. and Germany increasing, the U. S. needed to expand its navy. The Naval Appropriation Act of 1916 called for a second to none. The Act authorized 10 battleships,6 Lexington-class battlecruisers,10 Omaha-class scout cruisers, a subsequent General Board recommendation for further destroyers to combat the submarine threat resulted in a total of 267 Wickes- and Clemson-class destroyers completed. However, the design of the ships remained optimized for operation with the battleship fleet, the requirements of the new design were high speed and mass production. The development of warfare during World War I created a requirement for destroyers in numbers that had not been contemplated before the war. A top speed of 35 knots was needed for operation with the Lexington battlecruisers, the final design had a flush deck and four smokestacks. It was a fairly straightforward evolution of the preceding Caldwell class, General dissatisfaction with the earlier 1,000 ton designs led to the fuller hull form of the flush deck type

11.
Senary
–
The senary numeral system has six as its base. It has been adopted independently by a number of cultures. Like decimal, it is a semiprime, though being the product of the two consecutive numbers that are both prime it has a high degree of mathematical properties for its size. As six is a highly composite number, many of the arguments made in favor of the duodecimal system also apply to this base-6. Senary may be considered interesting in the study of numbers, since all primes other than 2 and 3. That is, for every number p greater than 3, one has the modular arithmetic relations that either p ≡1 or 5. This property maximizes the probability that the result of an integer multiplication will end in zero, E. g. if three fingers are extended on the left hand and four on the right, 34senary is represented. This is equivalent to 3 ×6 +4 which is 22decimal, flipping the sixes hand around to its backside may help to further disambiguate which hand represents the sixes and which represents the units. While most developed cultures count by fingers up to 5 in very similar ways, beyond 5 non-Western cultures deviate from Western methods, such as with Chinese number gestures. More abstract finger counting systems, such as chisanbop or finger binary, allow counting to 99,1,023, or even higher depending on the method. The English monk and historian Bede, in the first chapter of De temporum ratione, titled Tractatus de computo, vel loquela per gestum digitorum, the Ndom language of Papua New Guinea is reported to have senary numerals. Mer means 6, mer an thef means 6 ×2 =12, nif means 36, another example from Papua New Guinea are the Morehead-Maro languages. In these languages, counting is connected to ritualized yam-counting and these languages count from a base six, employing words for the powers of six, running up to 66 for some of the languages. One example is Kómnzo with the numerals, nimbo, féta, tarumba, ntamno, wärämäkä. Some Niger-Congo languages have been reported to use a number system, usually in addition to another. For some purposes, base 6 might be too small a base for convenience. The choice of 36 as a radix is convenient in that the digits can be represented using the Arabic numerals 0–9 and the Latin letters A–Z, this choice is the basis of the base36 encoding scheme. Base36 encoding scheme Binary Ternary Duodecimal Sexagesimal Shacks Base Six Dialectic Digital base 6 clock Analog Clock Designer capable of rendering a base 6 clock Senary base conversion

12.
Admirable-class minesweeper
–
The Admirable class was the largest and one of the most successful classes of minesweepers the United States Navy ordered during World War II. Typically, the detected and removed naval mines before the rest of the fleet arrived. They were also charged with anti-submarine warfare duties with rear-mounted depth charge racks and their job was essential to the safety and success of U. S. naval operations during World War II and the Korean War. These minesweepers were also employed as patrol vessel and convoy escorts, at least some of them saw action in the Soviet offensive against Japanese forces in Northeast Asia in August 1945. The Soviet Union never returned them to the United States, USS Hazard survives as a museum ship on dry land in Omaha, Nebraska. USS Inaugural was a ship on the Mississippi River in St. Louis. USS Scuffle was scuttled off the coast of Cozumel, Mexico in 1999 and it is now a popular site for scuba diving. List of Admirable class minesweepers Media related to Admirable-class minesweeper at Wikimedia Commons